maolaine



(No Model.) A MAGLAINE 2 Sheets-Sheet I.

PISTON PACKING.

Patented May 20, 1884.

m W M (No Model.) 7 2 Sheets-Sheet 2.

A. MAGLAINE.

PI'STON PACKING. No. 298,871. Patented May 20, 1884.

llllln ilk I IIIIIIIUIII NIH Winmw: izwmiaz? I J %7%w/M%M llnirnn drainsParimr @FFIQE ALEXANDER MAOLAINE, OF BELFAST, COUNTY OF ANTRIM, IRELAND.

PISTQN-PACKING.

SPECIFICATION forming part of Letters Patent No. 298,871, dated May 20,1884:.

Application fileddanuary 3, 1884. (No model.) Patented in FranceFebruary 24, 1883, No. 153,918; in England June 6, 1883, No. 2,802, andAugust 11, 1883, No. 3,894, and in Belgium August 16, 1883, No. 02,173.

To all whom it may concern.-

Be it known that I, ALEXANDER llIAOLAINE, of Belfast, county of Antrim,Ireland, in the Kingdom of Great Britain, by way of addition to theImprovements in Steam and other Pistons for which I have obtainedLetters Patent of the United States of America, bearing date the 6th dayof November, 1883, numbered 288, 082, have invented certain adaptationsand modifications of my said improvements, of which the annexed is thespecification.

I prefer to use only two packing-rings, each having one transverse cut,and being fitted with a coil-spring, in order to expand such ring in acircumferential direction, and a bar or tube to strengthen and maintainthe spring in position, as describedin my principal specification. Iarrange the inside of the packingrings with grooves or jaws, by whichthe coilspring and bar or tube may be placed in po sition from theinside without any material or injurious expansion of the ring, and Isecure them in such position by means of pins or other fastenings. Thepressure of the coilspring is adjusted by the use of a steel washer ofrequisitethickness at each end of the sprin In some cases I employgun-lock C or other like springs inside each packing-ring, and

placed at or near to the part of the ring which is diametricallyopposite to the transverse cut and coil-spring, so as to aid thecoil-spring in expanding the packing-ring, and I may use a series ofsuch springs extending at intervals farther or entirely round thepacking-ring, and may dispense with the coil-spring altogether; or I mayplace one or more of such springs at each end of the packing-ring wherecut through in substitution for the coil-spring, and I construct theinside of the packing-rings with ribs, blocks, snugs, or otherprojections cast in them, so disposed that the rings may thereby receivesupport from the body of the piston and resist the force of the steam orwa ter; and in order to press the packing-rings apart in the directionof the longitudinal axis of the cylinder,I prefer to employ two or moreflat steel springs having two or more waves or corrugations in eachspring, and being placed at intervals around the circumference of andbetween the packing-rings, and inclosed within annular recesses formedon the contiguous surfaces of the packing-rings by constructing flangeson the outside and inside edges of the rings, or confined between aflange 011 the outside edge of the ring and the body of the piston onthe inside, and I thicken or double over the ends of the flat springs,or furnish them with a bend or angle, or otherwise arrange them with afoot or stop approximating to the width and depth of the recess, toprevent such springs from slipping or shifting.

I shall now refer to the accompanying sheet of drawings, in order toillustrate the adaptations and modifications of my principalinvention,which I have hereinbefore described, the same letters ofreference being used throughout all the figures to indicate the same orcorresponding parts of my arrangements.

Figure 1 is a sectional elevation of apiston, showing, among otherparts, the flanged packin g-rin gs with blocks, the coil-springs withbars or tubes, and the flat steel springs in the re cess formed betweenthe packing-rings, shown both between the outside and inside flanges andbetween. an outside flange and the body of the piston, 850. Fig. 2 is aplan of a piston having the j unk-ring removed, and showing, among otherparts, apacking-ring with blocks, the coil-spring with bar or tubethrough it, steel washers, jaws, and securing-pins, a series of Csprings all round between the body of the piston and the packingring,and the pin which prevents the packing-ring traveling round the piston,&c. Fig. 3 is an enlarged detail of Fig. 1, showing thepacking-ringswithblocks, the junk-ring, and the wave-spring confinedbetween the body of the piston and the flanges on the outside edges ofthe packingrings. Fig. 4 is an enlarged detail of Fig. 1, showing thepacking-rings with blocks, and the securing-pin, the coilspring and bar,and the wavespring in the recess formed by flanges on the outside andinside edges of the packing-rings. Fig. 5 is an enlarged detail of Fig.2, showing the position and application of the pin which, if desired,may be used to prevent the packing-rings traveling round the piston.Fig. 6 is an enlarged detail of Fig. 2, showing the packing-rings withjaws for receiving the coilspring with bar through it, and the pins toIOO secure same in the jaws, and the steel washers to adjust thepressure of the coil-springs; and Fig. 7 is an enlarged sectional detailshowing in elevation the same parts as shown in Fig. 6, and also theflat steel waved or corrugated springs with doubled-over ends in therecess formed between the packing-rings.

' a a are the packing-rings; b b, the coilsprings; 'O C, the bars ortubes through the IO coil-springs; d d, the pins which secure thecoil-spring bars in the grooves or between the jaws formed on thepacking-rings. e is the junk-ring; f, the body of the piston. g g arethe jaws on the packing-ring; h h, the steel I 5 washers by which thepressureof the coilspring is adjusted; K K, the flat waved or corrugatedsprings; Z Z, the doubled-over ends of the flat springs; in m, theflanges on the outside and inside edges of the packing-rings;

n n, the blocks cast on the packing-rings; 0 0, the C springs; and p,the pin through the ovaled hole in the packing-ring, which, if desired,prevents it traveling round the piston.

I claim- 1, In a steam or other piston packing, the combination, withthe packing-rings having jaws, of the coiled springs, supporting bars ortubes, and means for securing the same in the jaws, whereby the'springsmaybe introduced and secured in place without straining the rings, asset forth.

, 2. The combination,with the packing-rings having flanges, of the wavesprings K K, whereby the springs are held in place by the flanges, asset forth.

3. The combination, with the double expansion piston packing ringshaving a series of ribs, blocks, or projections, of the gun lock orother springs bearing upon the body of the piston and extending betweenthe projections, 40 as and for the purpose set forth.

4. In a piston-packing, the double expansion packing rings provided witha series of ribs, blocks, snugs, or other projections on the inner sideof the rings, approaching the body of the piston and adapted to preventthe rings being forced inwardly too far, as set forth.

5. The combination, with the expansionrings, of the flat wave-likesprings between the adjacent sides of the rings, the ends of which areprovided with feet or stops, as set forth.

6. An expansion packing consisting of flanged rings, wave-like springssecured between the flanges, lugs or stops upon the inside of the rings,and coiled springs and means for securing the same in the jaws of therings, as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ALEXANDER MAOLAINE.

Witnesses:

HUGH HYNDMAN,

Solicitor. SAML. P. BROW'N.

